Cant find exspantion valve on a/c - S 10 Chevrolet Cars & Trucks

Hi, phil! what vehicle and model are u working on? Usually the a/c expansion valve is located or mounted either on the left or right side of the engine firewall depending on model. Just follow the path of two a/c pipes , one thick and one thin, going towards the firewall at a common point. where they are bolted to a rectangular block, which is the expansion valve.